Tetsuya Kanagawa, Keita Fujii, Shinichiro Uesawa, Akiko Kaneko, Yutaka Abe. Inhomogeneous theory based on sound speed measurement for mixture of water and many microbubbles in a converging-diverging tube. INTER-NOISE 2017 - 46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet. 2017. 2017-January